CN113294443B - Bearing device and wind power generation equipment - Google Patents

Abstract

The application provides a bearing device and wind power generation equipment. The rotating shaft is provided with a first end and a second end which are distributed oppositely along the axial direction of the rotating shaft, and the bearing seat is provided with a first bearing component positioned at the first end and a second bearing component positioned at the second end. The first bearing assembly comprises a plurality of sliding bearings distributed along the circumferential direction of the mounting hole, and the sliding bearings are in sliding contact with the first end of the rotating shaft along the circumferential direction of the rotating shaft and support the rotating shaft; the second bearing assembly includes a rolling bearing rotatably coupled to the second end. When the bearing device is used, the first end can be used as the end with larger stress, and the second end can be used as the end with smaller stress. By using a sliding bearing at the first end to support the shaft and a rolling bearing at the second end in whole or in part in the second bearing assembly, safe operation of the bearing assembly is ensured while reducing the weight of the bearing assembly.

Description

Bearing device and wind power generation equipment

Technical Field

The application relates to the field of wind driven generators, in particular to a bearing device and wind power generation equipment.

Background

Because of the continuous reduction of non-renewable energy sources such as petroleum, minerals and the like, people pay attention to wind energy increasingly, and wind power generation equipment is also widely used. The sliding bearing has the advantage of larger bearing capacity, and along with the increase of the size of the wind power generation equipment and the stress of the rotating shaft, the wind power generation equipment increasingly adopts the sliding bearing to support the rotating shaft.

However, the weight and the required installation space of the slide bearing are large, thereby resulting in a bearing device employing the slide bearing which is also large in weight and size, and is disadvantageous in installation and maintenance of the apparatus.

Disclosure of Invention

The application provides a bearing device and wind power generation equipment, which can reduce the weight of the bearing device and ensure the safe operation of the bearing device.

In a first aspect, the present application provides a bearing device comprising:

The bearing seat is provided with a mounting hole, and a first bearing assembly and a second bearing assembly are arranged on the bearing seat; the first bearing assembly comprises a plurality of sliding bearings distributed along the circumference of the mounting hole, and the second bearing assembly comprises a first rolling bearing;

The rotating shaft is arranged in the mounting hole, the rotating shaft is provided with a first end and a second end which are distributed oppositely along the axial direction of the rotating shaft, the first bearing assembly is positioned at the first end, and the plurality of sliding bearings are in sliding abutting joint with the first end of the rotating shaft along the circumferential direction of the rotating shaft and support the rotating shaft; the second bearing assembly is located at the second end, and the first rolling bearing is rotatably connected with the second end of the rotating shaft.

Optionally, the first rolling bearing comprises a first inner ring and a first outer ring which are connected with each other in a rotating way, the first outer ring is connected with the bearing seat, and the first inner ring is sleeved at the second end of the rotating shaft and supports the rotating shaft.

Optionally, the first outer ring includes a first sub-outer ring and a second sub-outer ring distributed along the first end to the second end, and the first inner ring includes a first sub-inner ring and a second sub-inner ring; the first sub-outer ring and the second sub-outer ring are connected with the bearing seat, the first sub-inner ring and the second sub-inner ring are sleeved at the second end of the rotating shaft, the first sub-outer ring is rotationally connected with the first sub-inner ring, and the second sub-outer ring is rotationally connected with the second sub-inner ring.

Optionally, a first roller is disposed between the first sub-outer ring and the first sub-inner ring, a second roller is disposed between the second sub-outer ring and the second sub-inner ring, a rotation axis of the first roller is inclined relative to an axial direction of the rotating shaft, a rotation axis of the second roller is inclined relative to the axial direction of the rotating shaft, and inclination directions of the first roller and the second roller are opposite.

Optionally, the first sub-outer ring has a first inner peripheral surface in rolling contact with the first roller, and the diameter of the first inner peripheral surface gradually decreases from a first end to a second end;

The second sub outer ring is provided with a second inner peripheral surface in rolling contact with the second roller, and the diameter of the second inner peripheral surface gradually increases from the first end to the second end.

Optionally, the rotating shaft includes a first limiting part and a second limiting part axially distributed on two sides of the first inner ring along the rotating shaft, the first limiting part is abutted with the first inner sub-ring, and the second limiting part is abutted with the second inner sub-ring;

The bearing seat comprises a third limiting part and a fourth limiting part which are axially distributed on two sides of the first outer ring along the rotating shaft, the third limiting part is abutted with the first sub-outer ring, and the fourth limiting part is abutted with the second sub-outer ring.

Optionally, an included angle between the rotation axis of the first roller and the axial direction of the rotating shaft is greater than or equal to 10 degrees and less than or equal to 30 degrees; and/or the number of the groups of groups,

The included angle between the rotation axis of the second roller and the axial direction of the rotating shaft is more than or equal to 10 degrees and less than or equal to 30 degrees.

Optionally, the first roller is cylindrical; the length of the first roller is greater than or equal to 80 mm and less than or equal to 120 mm, and the diameter of the first roller is greater than or equal to 60 mm and less than or equal to 100 mm; and/or the number of the groups of groups,

The second roller is cylindrical; the length of the second roller is greater than or equal to 80mm and less than or equal to 120 mm, and the diameter of the second roller is greater than or equal to 60 mm and less than or equal to 100 mm.

Optionally, the second end of the rotating shaft is connected with a first abutting part, the first abutting part is provided with a first abutting surface, and the first abutting surface is opposite to the end face of the bearing seat, which is close to the second end; the second bearing assembly comprises a second rolling bearing, the second rolling bearing comprises a first shaft collar and a first seat ring which are distributed along the axial direction of the rotating shaft, the first shaft collar is rotationally connected with the first seat ring, the first shaft collar is abutted with the first abutting surface, and the first seat ring is connected with the bearing seat; and/or the number of the groups of groups,

The first end of the rotating shaft is connected with a second abutting part, the second abutting part is provided with a second abutting surface, and the second abutting surface is opposite to the end face of the first end of the bearing seat; the first bearing assembly comprises a third rolling bearing, the third rolling bearing comprises a second shaft ring and a second seat ring which are distributed along the axial direction of the rotating shaft, the second shaft ring is rotationally connected with the second seat ring, the second shaft ring is abutted with the second abutting surface, and the second seat ring is connected with the bearing seat.

In a second aspect, the present application provides a wind power plant comprising:

A mounting base;

a bearing device, wherein the bearing device is provided in the embodiment of the application, and a bearing seat of the bearing device is arranged on the mounting seat;

the blade is connected with the rotating shaft of the bearing device;

The generator comprises a stator and a rotor, wherein the stator is connected with the bearing seat, and the rotor is connected with the rotating shaft.

The application provides a bearing device and wind power generation equipment. The rotating shaft is provided with a first end and a second end which are distributed oppositely along the axial direction of the rotating shaft, and the bearing seat is provided with a first bearing component positioned at the first end and a second bearing component positioned at the second end. The first bearing assembly comprises a plurality of sliding bearings distributed along the circumferential direction of the mounting hole, and the sliding bearings are in sliding contact with the first end of the rotating shaft along the circumferential direction of the rotating shaft and support the rotating shaft; the second bearing assembly includes a first rolling bearing rotatably coupled to the second end. By adopting the sliding bearing to support the rotating shaft at the first end with larger stress and adopting the rolling bearing in the second bearing component at the second end with smaller stress, the weight of the bearing device is reduced, and the safe operation of the bearing device can be ensured.

Drawings

The technical solution and other advantageous effects of the present application will be made apparent by the following detailed description of the specific embodiments of the present application with reference to the accompanying drawings.

Fig. 1 is a schematic structural view of a bearing device according to a first embodiment of the present application;

fig. 2 is a schematic structural view of a bearing device according to a second embodiment of the present application;

fig. 3 is an enlarged view of region a in fig. 2;

FIG. 4 is an enlarged view of region B of FIG. 3;

Fig. 5 is a schematic structural view of a bearing device and a stator and a rotor of a generator according to an embodiment of the present application.

Bearing device	1	Bearing pedestal	10	Mounting hole	110
						First bearing assembly	11	Second bearing assembly	12	Rotating shaft	13
First end	131	Second end	132	Sliding bearing	111
						A first inner peripheral surface	12111	First outer ring	1211	A first inner ring	1212
A second inner peripheral surface	12112	First rolling bearing	121a	First sub-outer ring	1211a
						Second sub-outer ring	1211b	First inner sub-ring	1212a	A second inner sub-ring	1212b
First roller	1213a	Second roller	1213b	Axis of rotation	X
						Length of	L	Diameter of	D	First limit part	13a
Second limit part	13b	Third limit part	14a	Fourth limit part	14b
						A first abutting part	1311	A second abutting part	1312	End face	101
A first contact surface	1301	A second contact surface	1302	Shaft collar	1201
						Seat ring	1202	Stator	21	Wind power generation equipment	E
Second rolling bearing	121b	Third rolling bearing	121c	Rotor	22
						Electric generator	2

Detailed Description

The following description of the embodiments of the present application will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present application, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the application without making any inventive effort, are intended to fall within the scope of the application. Furthermore, it should be understood that the detailed description is presented herein for purposes of illustration and description only, and is not intended to limit the application. In the present application, unless otherwise indicated, terms of orientation such as "upper" and "lower" are used to generally refer to the upper and lower positions of the device in actual use or operation, and specifically the orientation of the drawing figures; while "inner" and "outer" are for the outline of the device.

The present application provides a bearing device and a wind power generation apparatus, each of which is described in detail below.

First, the embodiment of the present application provides a bearing device 1. As shown in fig. 1, the bearing device 1 includes a bearing housing 10 and a rotating shaft 13, the bearing housing 10 having a mounting hole 110, the rotating shaft 13 being mounted in the mounting hole 110. The rotary shaft 13 has a first end 131 and a second end 132 which are disposed opposite to each other in an axial direction thereof, and the bearing housing 10 is provided with a first bearing assembly 11 at the first end 131 and a second bearing assembly 12 at the second end 132.

Wherein, the first bearing assembly 11 comprises a plurality of sliding bearings 111 distributed along the circumferential direction of the mounting hole 110, and the plurality of sliding bearings 111 are in sliding contact with the first end 131 of the rotating shaft 13 along the circumferential direction of the rotating shaft 13 and support the rotating shaft 13; the second bearing assembly 12 includes a first rolling bearing 121a rotatably coupled to the second end 132.

It should be noted that, in the embodiment provided in the present application, the bearing device 1 may be connected to a blade (not shown in the drawings) of the wind power plant at the first end 131 of the rotating shaft 13 during use, so that the radial force applied to the rotating shaft 13 at the first end 131 is greater than the radial force applied to the rotating shaft at the second end 132. I.e., the first end 131 is the more stressed end and the second end 132 is the less stressed end.

The slide bearing 111 has the advantage of a large load-bearing capacity and easy replacement, but its weight and required installation size are large. In the bearing device 1 provided by the application, the sliding bearing 111 is adopted at the first end 131 with larger stress to support the rotating shaft 13, and the rolling bearing 121 is adopted in the second bearing assembly 12 at the second end 132 wholly or partially, so that the weight and the size bias when the bearing device 1 wholly adopts the sliding bearing 111 are avoided, and the safe operation of the bearing device 1 is ensured while the weight of the bearing device 1 is reduced.

Referring to fig. 1,2 and 3, in the embodiment provided by the present application, the first rolling bearing 121a includes a first inner ring 1212 and a first outer ring 1211 rotatably connected to each other, the first outer ring 1211 is connected to the bearing housing 10, and the first inner ring 1212 is sleeved on the second end 132 of the rotating shaft 13 and supports the rotating shaft 13. I.e. the first rolling bearing 121a is a rolling bearing which is subjected to radial forces.

It should be noted that the second bearing assembly 12 may use a rolling bearing that receives a radial force, a rolling bearing that receives an axial force, or the second bearing assembly 12 may use both a rolling bearing that receives a radial force and a rolling bearing that receives an axial force.

In some embodiments of the present application, as shown in fig. 1, the second bearing assembly 12 includes a first rolling bearing 121a and a second rolling bearing 121b. The first outer ring 1211 of the first rolling bearing 121a is connected to the bearing housing 10, and the first inner ring 1212 of the first rolling bearing 121a is sleeved on the second end 132 of the rotating shaft 13 and supports the rotating shaft 13. A second abutting portion 1312 is connected to the second end 132 of the rotating shaft 13, and the second abutting portion 1312 has a second abutting surface 1302 facing the end surface 101 of the bearing housing 10.

The second bearing assembly 12 further includes a second rolling bearing 121b, the second rolling bearing 121b including a race 1201 and a raceway 1202 distributed along the axial direction of the rotary shaft 13, the race 1201 of the second rolling bearing 121b abutting the first abutment surface 1301, the raceway 1202 of the second rolling bearing 121b being connected to the bearing housing 10.

By providing the first rolling bearing 121a and the second rolling bearing 121b in the second bearing assembly 12, i.e. the rolling bearing receiving both radial and axial forces is employed in the second bearing assembly 12. Thereby further reducing the number of slide bearings 111 in the bearing apparatus 1, contributing to weight saving of the bearing apparatus 1.

In some embodiments of the present application, as shown in fig. 1, the first end 131 of the rotating shaft 13 is connected with a second abutment 1312, and the second abutment 1312 has a second abutment surface 1302 opposite to the end surface 101 of the bearing housing 10. The first bearing assembly 11 includes a third rolling bearing 121c, the third rolling bearing 121c includes a race 1201 and a raceway 1202 distributed along the axial direction of the rotary shaft 13, the race 1201 of the third rolling bearing 121c abuts the second abutment surface 1302, and the raceway 1202 of the third rolling bearing 121c is connected to the bearing housing 10.

The weight of the bearing device 1 is further reduced by providing a third rolling bearing 121c in the first bearing assembly 11, i.e. by using the third rolling bearing 121c at the first end 131 instead of the sliding bearing 111 to withstand axial forces.

In some embodiments of the present application, in conjunction with fig. 2 and 3, the first outer race 1211 of the first rolling bearing 121a includes a first sub-outer race 1211a and a second sub-outer race 1211b distributed along the first end 131 to the second end 132. The first inner race 1212 of the first rolling bearing 121a includes a first inner sub-race 1212a and a second inner sub-race 1212b distributed along the first end 131 to the second end 132.

The first rolling bearing 121a includes first rollers 1213a in rolling connection with the first sub-outer race 1211a and the first sub-inner race 1212a, respectively, and second rollers 1213b in rolling connection with the second sub-outer race 1211b and the second sub-inner race 1212b, respectively. The first sub outer race 1211a and the first sub inner race 1212a are rotatably coupled by a first roller 1213a, and the second sub outer race 1211b and the second sub inner race 1212b are rotatably coupled by a second roller 1213b.

By providing the first rolling bearing 121a in a double row structure having two rollers, it is convenient to mount and dismount the first rolling bearing 121, and it is easy to manufacture and process the rollers.

The first roller 1213a and the second roller 1213b may be spherical or cylindrical, and the shape thereof may be determined according to actual circumstances. Preferably, in conjunction with fig. 2 and 3, the first roller 1213a and the second roller 1213b are cylindrical. Thereby increasing the load carrying capacity of the first roller 1213a and the second roller 1213 b.

In some embodiments of the present application, referring to fig. 2,3 and 4, the rotation axis X of the first roller 1213a is inclined with respect to the axial direction of the rotary shaft 13, the rotation axis X of the second roller 1213b is inclined with respect to the axial direction of the rotary shaft 13, and the inclination directions of the first roller and the second roller are opposite. I.e. the first rolling bearing 121a is a double row conical rolling bearing.

By disposing the first roller 1213a and the second roller 1213b obliquely, the first rolling bearing 121a can receive both axial force and radial force. Accordingly, the number of the slide bearings 111 or the rolling bearings 121 in the bearing device 1 that receive the axial force can be reduced accordingly, contributing to further weight reduction of the bearing device 1. Meanwhile, the first rolling bearing 121a adopts a double-row conical rolling bearing 121 structure, and the bearing capacity of the double-row conical rolling bearing is larger than that of the single-row rolling bearing 121, so that the safe operation of the bearing device 1 is ensured.

Note that the inclination directions of the first roller 1213a and the second roller 1213b may be determined according to actual conditions. Preferably, referring to fig. 3 and 4, the first sub-outer ring 1211a has a first inner peripheral surface 12111 in rolling contact with the first roller 1213a, and the diameter of the first inner peripheral surface 12111 gradually decreases in the direction from the first end 131 to the second end 132. The second sub outer ring 1211b has a second inner peripheral surface 12112 in rolling contact with the second roller 1213b, and the diameter of the second inner peripheral surface 12112 gradually increases in the direction from the first end 131 to the second end 132.

By disposing the first roller 1213a and the second roller 1213b so as to incline as in fig. 3 and 4, the middle portion of the first outer race 1211 is convex in the bearing housing 10 to rotation shaft 13 direction, and the middle portion of the first inner race 1212 is concave in the bearing housing 10 to rotation shaft 13 direction. The material of the first inner ring 1212 may be reduced, thereby reducing the weight of the first inner ring 1212. Since the first inner ring 1212 is sleeved on the rotating shaft 13, the reduction in weight of the first inner ring 1212 is beneficial to reducing the radial load of the second bearing assembly 12 during use of the bearing device 1.

It will be appreciated that the greater the angle of inclination of the first and second rollers 1213a, 1213b, the greater the axial load that the first rolling bearing 121a can withstand, and the lesser the radial load that the first rolling bearing 121a can withstand; conversely, the smaller the inclination angle of the first roller 1213a and the second roller 1213b, the larger the radial load that the first rolling bearing 121a can withstand, and the smaller the axial load that the first rolling bearing 121a can withstand. The inclination angle of the first roller 1213a and the second roller 1213b may be determined according to the ratio of the axial force and the radial force applied to the bearing device 1 during use.

Preferably, in the embodiment provided by the present application, the angle between the rotation axis X of the first roller 1213a and the axial direction of the rotary shaft 13 is greater than or equal to 10 degrees and less than or equal to 30 degrees. The angle between the rotation axis X of the second roller 1213b and the axial direction of the rotary shaft 13 is greater than or equal to 10 degrees and less than or equal to 30 degrees. Therefore, the ratio of the radial load and the axial load of the first rolling bearing 121a is controlled within a reasonable range, which is advantageous for safe and stable operation of the bearing device 1.

The larger the size of the roller, the larger the bearing capacity of the rolling bearing, but correspondingly, the manufacturing cost and the installation space of the rolling bearing are also higher, and the size of the roller in the rolling bearing can be determined according to the actual situation.

Preferably, in the embodiment provided by the present application, the length L of the first roller 1213a is greater than or equal to 80 mm and less than or equal to 120 mm, and the diameter D of the first roller 1213a is greater than or equal to 60 mm and less than or equal to 100 mm. The length L of the second roller 1213b is greater than or equal to 80 mm and less than or equal to 120 mm, and the diameter D of the second roller 1213b is greater than or equal to 60 mm and less than or equal to 100 mm. The bearing capacity of the rolling bearing is ensured to be enough, and the manufacturing cost and the installation space can be controlled within a reasonable range.

In the embodiment provided by the application, referring to fig. 2 and 3, the rotating shaft 13 includes a first limiting portion 13a and a second limiting portion 13b axially distributed along the rotating shaft 13 at two sides of the first inner ring 1212. The first limit portion 13a abuts against the first inner sub-ring 1212a, and the second limit portion 13b abuts against the second inner sub-ring 1212 b.

The bearing housing 10 includes a third limiting portion 14a and a fourth limiting portion 14b axially distributed along the rotation shaft 13 on both sides of the first outer ring 1211, the third limiting portion 14a is in contact with the first outer sub-ring 1211a, and the fourth limiting portion 14b is in contact with the second outer sub-ring 1211 b.

By providing the first and second stopper portions 13a and 13b on the rotation shaft 13 and providing the third and fourth stopper portions 14a and 14b on the bearing housing 10, the outer race 1211 and the inner race 1212 of the first rolling bearing 121a can be prevented from falling off when the first rolling bearing 121a receives a large axial load. Thereby, a safe operation of the bearing device 1 is ensured.

It should be noted that the manner of setting the limiting portions on the rotating shaft 13 and the bearing seat 10 may be determined according to actual situations. In the embodiment provided by the present application, as shown in fig. 3, the first limiting portion 13a is a part of the protrusion of the rotating shaft 13, and the second limiting portion 13b is fixedly connected with the rotating shaft 13 through a screw. The second limiting portion 13b may be integrally formed with the rotating shaft 13, which is not limited herein.

In the embodiment provided by the present application, as shown in fig. 3, the third limiting portion 14a is a part of the protrusion of the bearing seat 10, and the fourth limiting portion 14b is fixedly connected with the bearing seat 10 through a screw. It should be understood that the fourth limiting portion 14b may be integrally formed with the bearing housing 10, which is not limited herein.

In the embodiment provided in the present application, referring to fig. 1 and 2, the diameter D of the shaft 13 at the first end 131 is larger than the diameter D thereof at the second end 132. By providing the shaft 13 with a first end 131 having a large diameter D and a second end 132 having a small diameter D, the shaft 13 can be reduced in weight while reducing material costs.

In a second aspect, an embodiment of the present application further provides a wind power plant. As shown in fig. 5, the wind power generation device includes a bearing device 1, and the specific structure of the bearing device 1 refers to the above embodiment, and since the wind power generation device also adopts all the technical solutions of all the above embodiments, at least has all the beneficial effects brought by the technical solutions of the above embodiments, and will not be described in detail herein.

Specifically, as shown in fig. 5, the wind power generation equipment E includes a mount (not shown in the drawings), a bearing device 1, a blade (not shown in the drawings), and a generator 2, wherein a bearing housing 10 of the bearing device 1 is mounted on the mount, the blade is connected with a rotating shaft 13 of the bearing device 1, the generator 2 includes a stator 21 and a rotor 22, and the stator 21 is connected with the bearing housing 10, and the rotor 22 is connected with the rotating shaft 13.

When the wind pushes the blades, the rotating shaft 13 is driven to rotate, and the rotating shaft 13 drives the rotor 22 in the generator 2 to rotate relative to the stator 21 so as to generate electric power, thereby converting wind energy into electric energy.

The bearing device and the wind power generation equipment provided by the application are described in detail, and specific examples are applied to explain the principle and the implementation mode of the application, and the description of the above examples is only used for helping to understand the technical scheme and the core idea of the application; those of ordinary skill in the art will appreciate that: the technical scheme described in the foregoing embodiments can be modified or some technical features thereof can be replaced by equivalents; such modifications and substitutions do not depart from the spirit of the application.

Claims (9)

1. A bearing device, characterized in that the bearing device comprises:

The bearing seat is provided with a mounting hole, and a first bearing assembly and a second bearing assembly are arranged on the bearing seat; the first bearing assembly comprises a plurality of sliding bearings distributed along the circumference of the mounting hole, and the second bearing assembly comprises a first rolling bearing;

the rotating shaft is arranged in the mounting hole, the rotating shaft is provided with a first end and a second end which are distributed oppositely along the axial direction of the rotating shaft, the first bearing assembly is positioned at the first end, and the plurality of sliding bearings are in sliding abutting joint with the first end of the rotating shaft along the circumferential direction of the rotating shaft and support the rotating shaft; the second bearing assembly is positioned at the second end, and the first rolling bearing is rotationally connected with the second end of the rotating shaft;

The second end of the rotating shaft is connected with a first abutting part, the first abutting part is provided with a first abutting surface, and the first abutting surface is opposite to the end face, close to the second end, of the bearing seat; the second bearing assembly comprises a second rolling bearing, the second rolling bearing comprises a first shaft collar and a first seat ring which are distributed along the axial direction of the rotating shaft, the first shaft collar is rotationally connected with the first seat ring, the first shaft collar is abutted with the first abutting surface, and the first seat ring is connected with the bearing seat; and/or the number of the groups of groups,

The first end of the rotating shaft is connected with a second abutting part, the second abutting part is provided with a second abutting surface, and the second abutting surface is opposite to the end face of the first end of the bearing seat; the first bearing assembly comprises a third rolling bearing, the third rolling bearing comprises a second shaft ring and a second seat ring which are distributed along the axial direction of the rotating shaft, the second shaft ring is rotationally connected with the second seat ring, the second shaft ring is abutted with the second abutting surface, and the second seat ring is connected with the bearing seat.

2. The bearing assembly of claim 1, wherein the first rolling bearing comprises a first inner race and a first outer race rotatably coupled to each other, the first outer race coupled to the bearing housing, the first inner race being snappingly received at a second end of the shaft and supporting the shaft.

3. The bearing apparatus of claim 2, wherein the first outer race comprises first and second sub-outer races distributed along the first end to the second end, the first inner race comprising first and second sub-inner races; the first sub-outer ring and the second sub-outer ring are connected with the bearing seat, the first sub-inner ring and the second sub-inner ring are sleeved at the second end of the rotating shaft, the first sub-outer ring is rotationally connected with the first sub-inner ring, and the second sub-outer ring is rotationally connected with the second sub-inner ring.

4. A bearing arrangement according to claim 3, wherein a first roller is provided between the first sub-outer ring and the first sub-inner ring, a second roller is provided between the second sub-outer ring and the second sub-inner ring, the rotation axis of the first roller is inclined with respect to the axial direction of the shaft, the rotation axis of the second roller is inclined with respect to the axial direction of the shaft, and the inclination directions of the first roller and the second roller are opposite.

5. The bearing apparatus according to claim 4, wherein the first sub-outer ring has a first inner peripheral surface in rolling contact with the first roller, the first inner peripheral surface having a diameter that gradually decreases in a first end-to-second end direction;

The second sub outer ring is provided with a second inner peripheral surface in rolling contact with the second roller, and the diameter of the second inner peripheral surface gradually increases from the first end to the second end.

6. The bearing device according to claim 3, wherein the rotating shaft includes a first limit portion and a second limit portion axially distributed along the rotating shaft on both sides of the first inner ring, the first limit portion being in abutment with the first inner sub-ring, the second limit portion being in abutment with the second inner sub-ring;

The bearing seat comprises a third limiting part and a fourth limiting part which are axially distributed on two sides of the first outer ring along the rotating shaft, the third limiting part is abutted with the first sub-outer ring, and the fourth limiting part is abutted with the second sub-outer ring.

7. The bearing apparatus of claim 4, wherein an angle between a rotational axis of the first roller and an axial direction of the shaft is greater than or equal to 10 degrees and less than or equal to 30 degrees; and/or the number of the groups of groups,

The included angle between the rotation axis of the second roller and the axial direction of the rotating shaft is more than or equal to 10 degrees and less than or equal to 30 degrees.

8. The bearing apparatus of claim 4 wherein the first roller is cylindrical; the length of the first roller is greater than or equal to 80 mm and less than or equal to 120 mm, and the diameter of the first roller is greater than or equal to 60 mm and less than or equal to 100 mm; and/or the number of the groups of groups,

The second roller is cylindrical; the length of the second roller is greater than or equal to 80mm and less than or equal to 120 mm, and the diameter of the second roller is greater than or equal to 60 mm and less than or equal to 100 mm.

9. A wind power plant, characterized in that the wind power plant comprises:

A mounting base;

bearing means as claimed in any one of claims 1 to 8, the bearing housing of which is mounted on the mounting;

the blade is connected with the rotating shaft of the bearing device;

The generator comprises a stator and a rotor, wherein the stator is connected with the bearing seat, and the rotor is connected with the rotating shaft.